body{
    width: 320px;
height:100%;
}
a{
    color: #118EEA;
text-decoration: none;
}

header{
    width: 100%;
    height: 100px;
    padding: 10px;
}
#z1{
    font-size: 20px;
}
ul{
    width: 100%;
height:20px;
margin: 0 auto;
list-style-type: none;
padding: 10px;
}
li{
    width: 100px;
    height: 30px;
    float: left;
    text-align: center;
}
ul li a{
    color: tomato;
    border-bottom: 1px solid tomato;
}
section{
    width:100%;
height:350px;
margin-left: 50px;
}
img{
    margin-right: 15px;
    }
footer{
    width: 100%;
height: 30px;
background: black;
}
#b1{
    font-size: 20px;
    color: #fff;
    font-weight: bold;
}
#b2{
    font-size: 22px;
    color: #fff;
}
#b3{
    font-size: 15px;
    color: #fff;
}






   

